273 Commando Slugs

Pins are lighter too.

Great to see several 273's being built. I wish I would have got the HP pistons strait from Egge, much better price than from Hughes.

I went with comp cams XS268S solid cam, balanced assembly as well, squared the block, stock heads, mild porting 1.84 intake and 1.60 exhaust valves and added a cam tensioner.

Heads have been milled slightly and even with MP .028 gaskets my machinist says I am right at 10.5 compression. Heads are 62cc

I am looking into oiling mods.

Love that CD idea for CC the cylinder head! I am going to put the piston down into the block 1/2" and seal it with vaseline and cc the piston dome to double check piston volume. I want to make sure of my compression ratio!